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<br />- REGRADED TOPOGRAPHY - <br />- ORIGINAL TOPOGRAPHY - <br />TOTAL BANK OVERBURDEN <br /> <br />AND PARTINGS db ds <br />i <br />- TOP OF COAL - <br />TOTAL COAL THICKNESS <br />- PIT FLOOR - <br />Ls <br />AREA swell = ( DEPTHswell )(LENGTHsection) <br />AREAbank = (DEPTHbank)(LENGTHsection) <br />PERCENT SWELL FACTOR = [(Ag / Ab) -~ 100 <br />ILLUSTRATIVE CROSS SECTION <br />EXHIBIT 2 <br />